Fine tunes the content view observers in SC.ScrollView. This prevents additional observers from being added to views that don't support calculatedHeight or calculatedWidth and prevents additional frame observers for being added to collection views, which reduces the duplicate calls to SC.ScrollView's contentViewFrameDidChange.
Reapplies the CSS transforms when touch scroll view's content frame changes. Because the CSS transforms are applied directly to the content view, if the content view's layout style changes, the transforms will be erased. Fixes #949.